It was mostly predictable but interesting enough to keep me watching. It's one of those times that predictability is more of a benefit than a hindrance to enjoyment. All in all though, there wasn't much meat to this and sometimes it just seemed like the writer was doing stuff just because they could...
This varied from so-so to decent, it wasn't ever really bad, and sometimes the designs and fluidity of movement was pretty good. There wasn't anything that truly stood out for me in a good or bad way... unless you count the boobs :\
I rarely notice when the background music is playing, and honestly this is typically a good thing since it's generally a mood setter and not something to be individually listened to. This time I did noticed a few points where the music abruptly stopped and I was "wrenched" from one setting to another. To me it should be a bit more fluid and unnoticeable. I wasn't so impressed here but it wasn't something I'll cry about to mommy either.
Probably the most enjoyable portion of the whole show but even then had it's problems. There also wasn't a whole lot of development in the characters or their relationships but as this is what I suspect to be the first in a few seasons worth of anime I think I can over look that for future growth.
I found myself laughing many times even during it's predictable moments. Though it did have a few issues, none of them were major. Aside from all that it had a very Ikki Tousen look to it, in other words, huge boobs on 90% of the female characters, clothing made of tissue paper that falls apart in combat, I even found that there were several character parallels between the two shows. A rare moment when the sum is greater than it's parts as you'll soon see.
Despite it's glaring deficiencies, Sekrei was a very enjoyable anime. While it won't make my Top Anime list, I will be looking for possible future seasons to see how the story develops.